From Pics I have seen many Mobil 1 Oil Filters ** Not ALL ** have the same bypass set up as FRAM... but many do and as you can see from pic its A leaf spring at the bottom of the oil can with the bypass built in with another spring.

here is a pic

perhaps it might be a better plastic then FRAM and Im not saying the FRAM bypass is bad...Im just making a point.

No doubt it was an extended change even more so with the track days. But it is what it is. He knows it should have been changed sooner. We get a good sample of a filter out of it so that's always a good thing.

He said oil was not changed but he did add about a quart In top offs.

As for time, 7 months or so of driving. The other 5 were with the car sitting on jack stands since his coil over snapped. Had to wait for them to warranty the part. That took forever. Once the new part came in I installed it for him and did the oil while I was under the car.

So while it was a year. It sat without being run for almost half of that time.

No doubt it was an extended change even more so with the track days. But it is what it is. He knows it should have been changed sooner.

Any idea what the Oil Life Monitor showed on the car at the many miles on the oil. The OLM system will take into account how the car is driven, so track days would have knocked off more oil life percentage than cruising down the highway at 60 MPH.

Seems impressive to me, but what do I know. I just think its impressive that it is still holding up. How to know if it is at capacity though?

Just looking at it may not be an accurate way - unless of course it filled up with sludge, etc while being on a very dirty engine. The only accurate way to know would to be able to measure the delta-p across the filter in real time while being used on the car.

From Pics I have seen many Mobil 1 Oil Filters ** Not ALL ** have the same bypass set up as FRAM... but many do and as you can see from pic its A leaf spring at the bottom of the oil can with the bypass built in with another spring.

here is a pic

perhaps it might be a better plastic then FRAM and Im not saying the FRAM bypass is bad...Im just making a point.

The "plastic" (high temperature nylon composite) in both filter brands is specified for the high temperature oil environment they are designed for.

There has never been any reports of "plastic" bypass valves that look defective after a filter cut-open.